... employ a glass or quartz filler in a resin matrix and are ideal   for the restoration of the front teeth and/or the cervicular region as they can be tinted to perfectly match the colour of the tooth to which it shall be applied.

Advantages:

• Aesthetically almost perfect – filling  matches tooth colour
• Size of cavity determines size of  filling; (minimal loss of tooth substance)

Disadvantages:

• Does not produce particularly tight seal: occurrence of caries between tooth and filling possible.